Can someone explain this command for me? (lemmy.ml)

submitted 2 months ago by Epzillon@lemmy.ml to c/linux@lemmy.ml

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Today I just learned that systemctl --force --force reboot is a command. We had a computer we remotely connected to which got permission errors and bus errors when we tried to reboot it normally. For some reason the mentioned command did actually manage to shutdown the computer bit did not manage to reboot it correctly.

I wonder what the double --force flag actually accomplishes and what possibly could hinder a regular reboot in this scenario.

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[-] hitwright@lemmy.world 90 points 2 months ago

As per systemctl(1) manual:

If --force is specified twice, the operation is immediately executed without terminating any processes or unmounting any file systems. This may result in data loss. Note that when --force is specified twice the halt operation is executed by systemctl itself, and the system manager is not contacted. This means the command should succeed even when the system manager has crashed.

[-] nerdovic@discuss.tchncs.de 32 points 2 months ago

Ah, the --no-preserve-root flag equivalent for a reboot 😄

[-] breakcore@discuss.tchncs.de 2 points 2 months ago

Good old --no-preserve-root 😅

[-] dan@upvote.au 9 points 2 months ago

Sounds like the equivalent of Alt+SysRq+B.

this post was submitted on 04 Sep 2024

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